Which statement correctly describes a requirement for ensuring accuracy in wire and cordage measuring devices?

• A. Returned to 0 before each measurement
• B. They must be calibrated only if inaccurate
• C. They must be operated in a manner that allows slippage
• D. There are no requirements

Answer: (A)

Returning to zero before each measurement ensures accuracy by resetting the instrument to a known reference point. This cancels any residual offset or drift from previous uses, wear, tension, or hook position, so the reading reflects only the length currently being measured. Without zeroing, the measurement will carry a systematic error equal to that offset, making results unreliable.

Calibrating only when you think something is wrong isn’t how accuracy is maintained—regular checks and proper zeroing are standard practice. Allowing slippage would also undermine accuracy, and saying there are no requirements isn’t true because reliable measurements depend on a correct zero reference.